As 4 principais razões pelas quais você deve usar o MongoDB

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import mysql.connector
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# CONNECT TO THE DB
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mydb = mysql.connector.connect(
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   host="localhost",
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   user="root",
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   passwd="rootroot",
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   database="CityHall"
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)
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mycursor = mydb.cursor(dictionary=True)
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# THE ID OF THE USER WHOSE PROFILE WE WILL BE RETRIEVING AND UPDATING
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userId = 1

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import pymongo
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from pymongo import MongoClient
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# CONNECT TO THE DB
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client = MongoClient()
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client = pymongo.MongoClient("mongodb+srv://root:rootroot@mycluster.mongodb.net/test?retryWrites=true&w=majority")
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db = client.CityHall
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# THE ID OF THE USER WHOSE PROFILE WE WILL BE RETRIEVING AND UPDATING
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userId = 1

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sql = "SELECT * FROM Users LEFT JOIN Hobbies ON Users.ID = Hobbies.user_id WHERE Users.id=%s"
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values = (userId,)
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my cursor.execute(sql, values)
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user = mycursor.fetchone()

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{u'city': u'Pawnee', u'first_name': u'Leslie', u'last_name': u'Yepp', u'user_id': 1, u'school': None, u'longitude': -86.5366, u'cell': u'8125552344', u'latitude': 39.1703, u'hobby': u'scrapbooking', u'ID': 10}

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hobbies = []
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if (user["hobby"]):
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  hobbies.append(user["hobby"])
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del user["hobby"]
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del user["ID"]
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for result in mycursor:
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  hobbies.append(result["hobby"])
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user["hobbies"] = hobbies

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user = db['Users'].find_one({"_id": userId})

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{
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   'city': 'Pawnee', 
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   'first_name': 'Leslie', 
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   'last_name': 'Yepp', 
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   'school': None, 
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   'cell': '8125552344', 
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   'latitude': 39.1703,
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   'longitude': -86.5366,3
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   'hobbies': ['scrapbooking', 'eating waffles', 'working'],
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   'user_id': 1
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}

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{
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   'city': 'Pawnee', 
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   'first_name': 'Leslie', 
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   'last_name': 'Yepp', 
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   'cell': '8125552344', 
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   'location': [-86.536632, 39.170344], 
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   'hobbies': ['scrapbooking', 'eating waffles', 'working'],
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   '_id': 1
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}

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user.update( {
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   "city": "Washington, DC",
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   "latitude": 38.897760,
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   "longitude": -77.036809,
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   "hobbies": ["scrapbooking", "eating waffles", "signing bills"]
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   } )

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user.update( {
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   "city": "Washington, DC",
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   "location": [-77.036809, 38.897760],
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   "hobbies": ["scrapbooking", "eating waffles", "signing bills"]
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   } )

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sql = "UPDATE Users SET first_name=%s, last_name=%s, cell=%s, city=%s, latitude=%s, longitude=%s, school=%s WHERE (ID=%s)"
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values = (user["first_name"], user["last_name"], user["cell"], user["city"], user["latitude"], user["longitude"], user["school"], userId)
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mycursor.execute(sql, values)
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mydb.commit()

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sql = "DELETE FROM Hobbies WHERE user_id=%s"
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values = (userId,)
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mycursor.execute(sql, values)
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mydb.commit()
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if(len(user["hobbies"]) > 0):
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   sql = "INSERT INTO Hobbies (user_id, hobby) VALUES (%s, %s)"
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   values = []
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   for hobby in user["hobbies"]:
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      values.append((userId, hobby))
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   mycursor.executemany(sql,values)
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   mydb.commit()

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result = db['Users'].update_one({"_id": userId}, {"$set": user})